Note 8 - Supplementary Balance Sheet Information (Tables)

6 Months Ended

Mar. 31, 2025

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	March 31,		September 30,
	2025		2024
Raw materials and purchased parts	$	40,693	$	34,134
Work-in-process		10,127		8,402
Finished goods		32,501		36,387
Total inventories	$	83,321	$	78,923

Schedule of Product Warranty Liability [Table Text Block]

	Six Months Ended March 31,
	2025			2024
Balance at beginning of period	$	5,213		$	3,974
Accruals for warranties during the period		698			1,371
Costs incurred during the period		(674	)		(650	)
Balance at end of period	$	5,237		$	4,695